he said he would ring me up, but he didn’t ___my telephone number?
| A．Has he forgotten | B．Must he forget | C．Must he have forgotten | D．Could he have forgotten |
In the competition, each side works like crazy to stay one step ______ the other.
| A．ahead of | B．apart from |
| C．rather than | D．except for |
He is really nervous. He ______ back and forth all the night waiting for the results.
| A．had walked | B．has been walking |
| C．walked | D．is walking |
With the word “Tuhao” ______ appearing in media reports, people pay greater attention to rich people’s life.
| A．simply | B． constantly |
| C．generally | D．consequently |
The App WeChat provides a networking platform ______ communication is faster and easier.
| A．why | B．which | C．when | D．where |
Amy ______ better last night, but she was a little nervous and didn’t reach her best standard.
| A．could perform | B．must have performed |
| C．should perform | D．could have performed |