He left the key ______ he had been an hour before.
| A．what | B．that | C．where | D．which |
In the experiment we kept _____ watchful eye on ______ developments and recorded every detail.
| A．a; / | B．/; the | C．a; the | D．/;/ |
I remember the time _____ Eric won that speech competition.
A where B why C when D which
You like travelling, _____ you?
A don’t B won’t C didn’t D haven’t
Jack, _____ friend, went back to America last Monday.
A me B I C my D mine
— My bike is broken. _____ I use yours?
— Sure. Here it is.
A Must B Will C Should D May