Once a decision has been made，all of us should ________ it.
| A．direct to | B．stick to | C．lead to | D．refer to |
It is dark outside, so please____ your step while going down the stairs.
| A．see | B．look | C．notice | D．mind |
We can’t help you ____ you tell us what’s wrong.
| A．Since | B．Unless | C．If | D．When |
I’m not a little hungry now, but I____ enough at lunch.
| A．eat | B．had | C．have had | D．have |
—Do you like pets?
| A．have | B．catch | C．keep | D．taste |
We will appreciate____ if your parents can help us.
| A．/ | B．that | C．it | D．this |