The __________ conclusion is not a set one. It still needs further testing.
| A．tentative | B．basic | C．bare | D．systematic |
. He was about to go out for a walk _____ his teacher came to visit him.
| A．while | B．which | C．when | D．then |
.With no one to ______ in such a frightening situation, she felt very helpless.
| A．turn on | B．turn off | C．turn around | D．turn to |
. He began to take political science _________ only when he left school.
| A．strictly | B．truly | C．carefully | D．seriously |
. Yesterday I went to see him, _________ that he had gone abroad two days before.
| A．only to learn | B．to learn only | C．only learned | D．only learning |
The bank is reported in the local newspaper_____ in broad daylight yesterday.
| A．being robbed | B．having been robbed |
| C．to have been robbed | D．robbed |