Hi, Tracy; how are you doing?—–I’m tired out, for I ______my living room all day

The young actress looked so charming in her beautifuldress that we took _____pictures with her

Where is Jack?I can’t find him anywhere.—He__________ his homework upstairs.

Some Chinese students find it hard to get used to the life in London —Exactly, ______ they’ve learnt a lot about the city before

he rapid development of medical science, we ___more new drugs used in the treatment of cancer．