Sometimes smiles ________ be false, hiding other feelings like anger, fear or worry.
| A．must | B．should |
| C．can | D．would |
Tom had to______ the invitation to the party last weekend because he was too busy.
| A．turn in | B．turn down |
| C．turn over | D．turn to |
Despite the previous rounds of talks, no agreement______ so far by the two sides.
| A．has been reached | B．was reached |
| C．will reach | D．will have reached |
I ______ have worried before I came to the new school, for my classmates here are very friendly to me.
| A．mightn’t | B．mustn’t |
| C．needn’t | D．couldn’t |
Jane can’t attend the meeting at 3 o’clock this afternoon because she ______ a class at that time.
| A．will teach | B．would teach |
| C．has taught | D．will be teaching |
The university started some new language programs to _____ the country’s Silk Road Economic Belt.
| A．apply to | B．cater for |
| C．appeal to | D．hunt for |