Lian Zhan, the Chairman of the KMT, enjoyed the scenery of the Huangpu River _______ the night of May 1st. [ ]

The train is going _____ the tunnel.[ ]

Is your father in?－ No, he ______ for three hours.

She looks sad. Do you know why?—Her son went to study in Canada. I think she _________ him.

There _____ a talk show on CCTV5 at nine this evening.