The old man leads ______happy life now, but he will never forget ______hard time when he was poor.
| A．the, a | B．/; the | C．the; / | D．a, the |
They stayed with me for three weeks ,______ they drank all the wine I had.
| A．which | B．which time |
| C．during which time | D．during that time |
It is reported that many a new house ______ at present in the disaster area.
| A．are being built | B．were being built |
| C．was being built | D．is being built |
------ I don’t think he is fit for the job, ______?
------Why do you think so ?
| A．do I | B．don’t I | C．is he | D．isn’t he |
______ is of great importance now , my teacher often reminds me ,is study.
| A．It | B． As | C．What | D．Which |
Although he was in poor health , Robert succeeded ______ other more famous engineers failed.
| A．which | B．that | C．what | D．where |