For the engine to work, the green button be in the “on” position.
| A．can | B．would | C．must | D．might |
相关试题
(绰号). Can you see that building ______ by trees? That’s ______ we study.
| A．surrounded; which | B．surrounding; where |
| C．to be surrounded; in which | D．surrounded; where |
Sir, you ________ take this seat. It’s just for the old.
| A．oughtn’t to | B．can’t | C．won’t | D．needn’t |
______ life began on earth is one of the biggest puzzles that scientist found hard ______.
| A．How; solving | B．When; to be solved |
| C．How; to solve | D．Which; to solve |
推荐套卷
粤公网安备 44130202000953号