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You ____ buy a gift, but you can if you want to.

A. must B. mustn't C. have to D. don't have to

 I'm afraid Mr. Harding ____ see you now.  He's busy. 

A. can't                              B. mustn't                   C. shouldn't                 D. needn't

Customers are asked to make sure that they ____ the right change before leaving the shop.

A. will give B. have been given C. have given D. will be given

It is said that early European playing cards ____ for entertainment and educations.

A.were being designed B. have designed C. have been designed D. were designed

Professor James will give us a lecture on the Western culture, but when and where ____ yet.

A. hasn't been decided B. haven't decided

C. isn't being decided D. aren't decided

 As the years passed, many occasions—birthdays, awards, graduations ____ with Dad's flower.

A. are marked                     B. were marked           C. have marked           D. had marked

I got caught in the rain and my suit ____.

A. has ruined B. had ruined C. has been ruined D. had been ruined

--What's that noise?　　　　　　　　　　　　　　　　

--Oh, I forgot to tell you. The new machine ____.

A. was tested B. will be tested C. is being tested D. has been tested

I like these English songs and they ____ many times on the radio.

A. taught B. have taught C. are taught D. have been taught

He ____ as a national hero for winning the first gold medal for his country in the Olympics.

A. regarded B. was regarded C. has regarded D. had been regarded