－Have you got any particular plans for the coming winter vacation?
－Yes, _ , I'm going to visit my grandparents．
| A．if necessary | B．if so | C．if ever | D．if possible |
With smart phones taking the world by ____ storm, a phone that can only send and receive voice calls and text messages may seem like ____ relic.
| A．a; a | B．the; 不填 | C．the；a | D．不填; a |
We ______ last night, but we went to the concert instead.
| A．must have studied | B．might study |
| C．should have studied | D．would study |
— What does the sign over there read?
— No person ______ smoke or carry a lighted cigarette, or pipe in this area．
| A．will | B．must | C．may | D．shall |
．How long is it ______ we last spent the holiday in the country together?
| A．until | B．before | C．since | D．that |
— Can you come on Friday or Saturday?
— I’m afraid ______ is possible．I will go to the hospital to look after my friend．
| A．either | B．none | C．any | D．neither |