Some people get in touch with each other by mobile phones__________ others keep contact with each other by e-mail.
| A．when | B．before | C．while | D．since |
The store had to a number of clerks because sales were down.
| A．lay out | B．lay off | C．lay aside | D．lay down |
----When did the concert?
---Well, two or three years ago?
| A．happen | B．take place | C．hold | D．start |
He offered to her a hand as the suitcase was too heavy for her to carry.
| A．hold | B．show | C．lend | D．borrow |
Tom,yourself. Did you forget the school rules?
| A．behave | B．believe | C．perform | D．conduct |
-- Not getting that job was a big bet down.
---Don’t worry. Something better will .
A. come along B. take on C. go by C. fall behind