4. ____ de, ii desu ne.
a. __O___ Kono hune "It is Ok to be this boat/This boat will do, right?"
b. __X___ Tomete
"De" is a Nominal gerund. "Tomete" itself is a gerund form of the verbal "tomeru". Therefore, the correct form should be, "Tomete ii desu ne (It is ok to stop/park/give a stay, right?)."
c. __O___ Raku "Being relaxed, is it good, right?"
d. __O___ Hatu-ka "It is OK to be the 20th/ the 20th will do, right?"
5. _____ ni mairimasu.
a. __O___ Hati-zi sugi "I will come past eight o'clock." (humble)
b. __X___ Maiban
"Maiban" is a generic time expression, therefore, it occurs without "ni". The correct form is "Maiban mairimasu (I come/go every evening)." (humble)
c. __O___ Gakkoo "I go/come to school." (humble)
d. __X___ Rok-kagetu
"Rokkagetu" is a duration, therefore, does not require particles. The correct form should be "Rok-kagetu mairimasu (I will go for six months)." (humble)
e. __O___ Do-niti "I will go/come on Saturday and Sunday."
f. __O___ Kaeri "I will go/come on my way back."
6. _____ kakarimasita ka?
a. __O___ Zuibun "Did it take awfully a lot?"
b. __X___ Ku-zi han
"Ku-zi han" indicates a specific time, not a duration. If you want to say "Did it take nine and a half hours?" it should be "Ku-zikan han kakarimasita ka?"
c. __O___ Ikura "How much did it cost?"
d. __X___ Ituka-goro
"Goro" is used to describe specific point in time, not a duration of time. Therefore, if you want to say "Did it take about five days?" it should be "Ituka-gurai/hodo kakarimasita ka?"
e. __X___ Zikan o
"Kakarimasu" is an affective verbal, thus, it does not take "Nominal + o" phrase. The correct form should be "Zikan ga kakarimasita ka? (Did it take some time?)"
f. __X___ Nan-niti ga
"Nan-niti" is a question word to ask duration in this case, therefore it should be placed right before the verbal. The correct form should be " Nan-niti kakarimasita ka? (How many days did it take?)"
g. __O___ Nana-nen "Did it take seven years?"
7. _____ orimasita.
a. __X___ Sensee ga
"Orimasu" is a humble polite verbal, thus, it cannot be used to describe the existence of somebody you should exalt. The correct form is "Sensee ga irassyaimasita (The teacher was here/came)." (honorific)
b. __X___ Tika de
Particle "de" indicates a place of action, not a place of existence. The correct form should be "Tika ni orimasita (I was in the basement)." (humble)
c. __O___ Kuukoo ni "I was at the airport." (humble)
d. __O___ Ni-kagetu "I was there for two months." (humble)
e. __X___ Getuyoo ga
"Getuyoo(bi)" is a time expression which takes "ni" to indicate a day when the action/matter described in the predicate takes place. The correct form should be "Getuyoo ni orimasita. (I was there on Monday)." (humble)
8. Yasumi wa _____ arimasu yo.
a. __X___ iti-zi
"Iti-zi" is a specifc time, not a duration. If you want to say "We have one-hour break," it should be "Yasumi wa iti-zikan arimasu yo."
b. __O___ nano-ka kara "We have a break from the seventh."
c. __O___ ato has-syuukan "As for our break, we have eight-weeks left."