The PLA soldiers came to the ruins of Yushu and after ______ seemed to be a long time, they helped some victims out.
| A．which | B．that | C．what | D．when |
This is the same bicycle ___ I lost.
| A．as | B．that | C．which | D．A and B |
There are no children ___ love their parents.
| A．that do not | B．who does not | C．that | D．who |
Children should not have more money ___ needed.
| A．which | B．that | C．than | D．as |
---Mary hasn't written to us for a long time.---What do you suppose __ to her?
| A．happened | B．to happen | C．was happened | D．having happened |
| A．are; were | B．is; were | C．are; was | D．is; was |