If his parents are convinced ____ the fact that his son always focuses his mind his study.
| A．of; on | B．of; at | C．by; to | D．on; at |
A dark blue design will not ___ on a blackboard.
| A．clear up | B．go up | C．show up | D．pick up |
The store had to___ a number of clerks because sales were down.
| A．lay out | B．lay off | C．lay aside | D．lay down |
Have a good rest, you need to ___ your energy for the tennis match this afternoon.
| A．have | B．save | C．hold | D．get |
. It was so noisy out side that he couldn’t ____ down to read.
| A．settle | B．put | C．sit | D．lie |
He offered to ___ her a hand as the suitcase was too heavy for her to carry.
| A．hold | B．show | C．lend | D．borrow |