When Lily was standing on the stage, she felt her heart________ quickly.
A.beat B.to beat C.beating D.beats
I can lend my dictionary to you, but please remember to________ it to me before next Friday.
A.return B.provide C.borrow D.review
When summer comes, my mother always warns me________ in the river.
A.swim B.to swim C.not to swim D.not swimming
He got the________ from his father. It was really a big surprise.
A.health B.confidence C.value D.support
Jack found it________ to finish the plan on time by himself. So he asked his teacher for help.
A.wonderful B.impossible C.terrible D.thankful
Although the task is so________， he still wants to try his best.
A.challenging B.interesting C.amazing D.relaxing
