根据句意，用括号内所给动词的适当形式填空。

小题1:—Why are you walking so quickly?  —________ (catch) the early bus.

小题2:—Have you been abroad? –Yes, I ________ (stay) in London for two years.

小题3:If you don’t like the drink you _________(order) ,just leave it and try a different one.

小题4:—What are you doing?  --I’m watching a match. It started at 7pm and ________(be) on for another half an hour.

小题5:—Who are you waiting for?-- Andy, he ________(expect) to come here at 3 o’clock. But he has’t come yet.

离心泵电流过大的原因不包括（）。

A．填料压得太紧

B．泵轴弯曲或对中不良

C．排出管路堵塞

D．排出管脱开敞口运转