Hearing the steps of their teacher on the floor, the students pretended ________ something attentively.

ng her biography, I was lost in admiration for Doris Lessing had achieved in literature.

The relatives of the passengers in the missing Flight MH370 cann’t hide their feelings, _____ they can make sure that the plane will make a safe landing on the airport

I have been skating _______ nine o’clock.

Wang Hui hopes ________ a scientist in the future.