單項(xiàng)選擇題

We have had a new computer system（）

A.install
B.installed
C.installing
D.to install

你可能感興趣的試題

單項(xiàng)選擇題

I never（）to bed so late.

A.got used to going
B.used to going
C.got usedto go
D.used going

單項(xiàng)選擇題

We're having some（）problems with our new computer.

A.teeth
B.tooth
C.teethe
D.teething