When ____ help, one says "Thank you" whi

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问题选择题

When ____ help, one says "Thank you" while when _____ help, one asks "Can I help you?"

A．ffered; offered

B．ffering; offered

C．offering; offering

D．offered; offering

答案

答案：D

选择题

It is the third time that Susan ______ late to work and it’s high time that she ________the truth.

A．has come; tell

B．has come; told

C．came; should come

D．had come; told

判断题

气力引射器工作时有毒气体由主管吸入。