—I wonder what makes you a successful manager.
—I ________ as a waiter for five years，which contributes a lot to my today’s work.
A．serve B．have served C．had served D．served
----What’s that noise?
---- There’s a truck stopping outside．It’s someone something.
A．deliver B．to deliver C．delivering D．delivered
After the trainer was sure that the whale could look after itself, he _______ it into the sea.
A. transported B. delivered C. released D. handled
The course about Chinese food attracts over 100 students per year, _______ up to half are from overseas.
A． in which B．of whom C． with which D． for whom
Too often we underestimate the power of a touch, a smile, a kind word, or the smallest act of caring, all of which have the potential to _______ a life _______.
A. get… up B. take… off C. bring… up D. turn… around
Besides proper diet, exercise is one of the key ___________of a healthy lifestyle.
A. components B. categories C. ranges D. processes
