There are hundreds of visitors __________ in front of the Art Gallery to have a look at Van Gogh’s paintings.
——Did Tom come back late last night? ——No. It was not yet 8 o’clock ____ he arrived home.
Our school has about 100 computers, but only sixty percent ____ used regularly.
Imagine how excited we were ____ that our schoolmates had been admitted to some famous universities.
Mum, I need a new schoolbag. Could you buy _______ for me tomorrow?
On March14, 2013, Xi Jinping was elected_______ president of _______ People’s Republic of China.