It is of great importance _______ parents say and do in family life, which may have a life-long effect on their children.
| A．what | B．that | C．how | D．why |
The computer centre, ____ last year , is very popular among the students in this school.
| A．open | B．opening | C．having opened | D．opened |
When the spaceship was , I could really feel the high gravity.
| A．lifting off | B．sending away | C．lifting away | D．giving a lift |
He still remembers the days ______ he spent with your family.
| A．when | B．where | C．that | D．on which |
The thieves ran away when the burglar alarm(防盗警报器).
| A．broke away | B．came back | C．went badly | D．went off |
The secretary worked late into the night, _____ a long speech for the president.
| A．to prepare | B．preparing | C．prepared | D．was preparing |