Shedidn’tknowshecouldexpresshe

She didn’t know__________she could express her ideas clearly when she was invited to speak at the meeting.

A．what

B．why

C．how

D．whether

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_______ the mouse, you can choose an icon _______ for more details.

A．By; to click on	B．With; to click on
C．With; to click	D．By; to click it

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----Look at the boy running on the playground. Is it David?
---- It ______ be him. I saw him go to the teachers’ office just now.

A．mustn’t

B．can’t

C．may not

D．needn’t

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A．how to use

B．when to use

C．where to use

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--______ to Hong Kong?
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A．Have you gone

B．Have you been

C．Are you going

D．Did you go

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They were _______ busy ______ the project ______ the time.

A．too; to discuss; to forget	B．too; discussing; to forget
C．so; to discuss; that they forgot	D．so; discussing; that they forgot

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