I must be off now. My friends ________ outside.
| A．wait | B．have waited | C．were waiting | D．are waiting |
相关试题
______ is it that metals plays such an important part in our daily life?
| A．Why | B．What | C．Where | D．When |
He is strict and kind-hearted teacher, ______ the children respect but are a bit afraid of.
| A．which | B．that | C．one which | D．one whom |
They have the right to check ______ the 
will is valid(有效的), of course.
| A．whether | B．why | C．when | D．how |
. I am arranging for Mr. Smith, one of our inspectors, to come and ______the damage caused to the building.
| A．attempt | B．assess | C．accuse | D．appear |
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