The students were completely _____ in their reading.
The project alongside with the experiment we had once devoted so much time __________ perfectly.
-Were you busy last week-end?-Very. Rather than __________ time playing cards as usual, I devoted every effort to __________ an advertisement.
__________ to improve the students' sight, the eye exercises are done in schools nation-wide.
Our hotel is a four-star hotel, which is located __________ Beihai Park __________ Beijing.
Sichuan is located __________ the west of China while Japan lies __________ the east of China.