Although he is a well-known star, he never gives others an impression that he is _________ those who play with him.

A new case study says Chinese companies face tough _____in the US and have a long way to go to be successful.

Please __________ that you must review your lesson after class.

 These crops ________  well to the warm and damp climate here.

—Do you know when we will carry out the plan?—Oh, no. It is still ________ discussion.