. Driving a car without insurance can have _____ consequences.
| A．uncertain | B．disastrous | C．potential | D．unworthy |
His enthusiasm for the plan seems to have______; he never speaks about it any more.
| A．worn off | B．turned off | C．kept off | D．taken off |
After thirty years of separation, I _____ with my sister. How happy we were!
| A．kept in touch | B．caught up | C．kept up | D．got in touch |
--- Have you seen the robber______?
--- Why ask me? You are the only one who stands _____ to him.
| A．clear; close | B．clearly; closely | C．clear; closely | D．clearly; close |
Only when I left my parents for Italy _____ how much I loved them.
| A．I realized | B．I had realized | C．had I realized | D．did I realize |
Some researchers believed that there is no doubt______ a cure for AIDS will be found.
| A．which | B．what | C．that | D．whether |