It was in the lab______ was taken charge of by Professor Zhang ____ they did the experiment．
| A．where, that | B．which, where | C．that, where | D．which, that |
Chang’e Satellite is named after a famous Chinese fairy , who is said ______to the moon.
| A．having flown | B．to have flown | C．to be flying | D．flying |
The article suggests that when a person _______ under unusual stress he should be especially careful to have a well-balanced diet.
| A．is | B．were | C．be | D．was |
A group of young Americans have come to Beijing for a visit. Half of them, ___is, 50 persons, can speak Chinese fluently.
| A．that | B．which | C．who | D．it |
Without proper lessons, you could _______ a lot of bad habits when playing the piano.
| A．keep up | B．pick up | C．draw up | D．catch up |
My stomach ______ me. I thought it was going away, but now it’s getting worse and worse.
| A．was killing | B．is killing | C．kills | D．killed |