When studying Wendy’s menu last time, I found that many of the items are similar to ______ of Mcdonald’s.

It was in the lab___was taken charge of by our teacher____ they did the experiment.

Newton say the famous words,” If I have been able to see further, it was only because I stood on the of giants (巨人).”

Lily, here are your pens. Please _____.—OK, Mom.

If he _______ the opportunity at that time, he would be the new department manager now.