Mr.Smith as well as two of his students ________ the experiment with care at the moment.
| A．is doing | B．are doing | C．does | D．do |
My mother ________ always wave goodbye to me while I was leaving for school.
| A．should | B．must | C．could | D．would |
Faced with the crisis(危机), the government _________ calm and took timely measures.
| A．grew | B．appeared | C．became | D．stayed |
In autumn, leaves turn yellow and _________ the trees.
| A．fall out | B．fall off | C．fall down | D．fall over |
I hoped Tina _________ to my birthday party next Thursday.
| A．to come | B．is coming | C．will come | D．was coming |
Several months later, he found Mr. Jackson very difficult ________.
| A．to get along with | B．getting along with |
| C．to get along | D．to be gotten along with |