Since nobody gave him any help, he ______ have done the research on his own.
| A．can | B．must | C．would | D．need |
If a shop has chairs __________ women can park their men, women will spend more time in the shop.
| A．that | B．which | C．when | D．where |
Helen was much kinder to her youngest son than to the others, __________, of course, made the others envy him.
| A．who | B．that | C．what | D．which |
The English play __________ my students acted at the New Year’s party was a great success.
| A．for which | B．at which | C．in which | D．on which |
Only when your identity has been checked__________.
| A．you are allowed to come in |
| B．You will be allowed to come in |
| C．will you allow to come in |
| D．will you be allowed to come in |
No sooner____ on my comfortable bed______ my telephone rang.
| A．had I lain, than | B．I had lain, than | C．had I lain, when | D．did I lain , when |