Once ________in the sun, an object becomes hot.
A、place
B、be placed
C、being placed
D、placed
A、place
B、be placed
C、being placed
D、placed
How often does the woman play golf?
A.About once seven days.
B.About once thirty days.
C.About once a year.
A、We are asked to discuss the proposal at once .
B、The proposal is asked to discussed at once
C、They asked the proposal to be discussed at once
D、The proposal was asked to be discussed at once
How did Bill know Jim Tomas?
A.They once studied together.
B.They once lived together.
C.They once worked together.
D.They once traveled together.
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