When you _____me last night，I _____the piano．（ ）
A．were calling； was playing
B．were calling； played
C．called； played
D．called； was playing
Before you start reading， ask yourself_____ you are reading this book． Most people read for two main reasons， pleasure or knowledge．（ ）
A．whyB．whatC．whereD．when
We _____ to Yun Brocade Museum with the exchange students this coming summer holiday．
That's amazing!（ ）
A．wentB．goC．have goneD．will go
Mexican and Tex﹣Mex foods were popular in the USA， _______ now Chinese food has more fans．（ ）
A．becauseB．butC．soD．unless
Simon， do you know who invented the kite？
Sure! It ____ by Mozi over 2，000 years ago．（ ）
A．is inventedB．invented
C．was inventedD．will be invented
Some people enjoy ______ out their messages in bottles when they travel on the sea．（ ）
A．to sendB．sendC．sendingD．sent