Human beings are different from animals _______ 
they can use language as a tool to communicate.
| A．in that | B．for that | C．in which | D．for which |
When I came back,I noticed that he was still sitting in the office.He seemed_________ for someone.
| A．waited | B．to have waited |
| C．to be waiting | D．to wait |
.—Mary wants to see you tonight.
—I’d rather she_________tomorrow.
| A．comes | B．came |
| C．will come | D．should come |
—What_________him to do such a silly thing?
—I have no idea.
| A．made | B．drove | C．brought | D．let |
The student was just about to_________ the question,when suddenly he found the answer.
| A．arrive at | B．work out |
| C．stick to | D．give up |
.I wish I_________ longer this morning,but I had to get up and come to class.
| A．could have slept | B．slept |
| C．might have slept | D．have slept |