The successful launch of Tiangong­1 symbolizes a further step for China to join in the________of space stations previously mastered by Russia and the US.

—Will you be ______ this evening, Mary?—That depends. I am afraid I will be with my manager discussing a plan.

(2013·石家庄高三二模)—Jack, this is the third time that you have been late this week.—Sorry, sir, but I was ________ for 15 minutes on the way here in the traffic jam.

The driver began to speed up to ______ for the hour he’d lost in the traffic jams.

You see, she’s losing her temper now. Let’s ______ her ________.