______ come into leaf or bloom is obviously a sign of spring.

What’s wrong with him—-The picture he came across___his memoryof a sad story in his childhood.

The hotel has been enlarged; ____, it’s service is improving

Liu Yang is the first Chinese woman astronaut_______ has ever traveled in space.

________in a heavy traffic jam in a taxiwhile you are hurrying to the airport is quite an unpleasant experience．