When _______ you _______ to learn to skate?–Five years ago.

.Look! It _____be your uncle .—-It_____ be him . He has gone to Xi’an.

What’s wrong with your car? – Well, as you know, cars usually_______ start in winter.

What do you think of the 3D film UP?—I enjoy it from beginning to end. This is the best one I haveseen.

We missed our train, and ___ the next train was delayed, ____ we had to wait for two hours.