—Tom graduated from college at a very young age.
—Oh,he__________have been a very smart boy then.

Michael  ______ be a policeman, for he is much too short.
A. needn’t    B. can’t      C should       D.  may

Something terrible       have happened if Li Chang was not coming to eat in his restaurant as he always did.

—Mom, I did not pass the exam.
—What a pity! You     it.

-----Do you know where David is ?  I couldn’t find him anywhere.
-----Well. He _______have gone far-----his coat’s still here.

The Smiths went to the country for the weekend as they ______ to the office.

—  My cat’s really fat.
— You ______ have given her so much food.

As to the question of whether we will sell our house or who we shall sell the house to, you ____ have answer by tomorrow.

---- Where are you going for the weekend?
---- I haven’t decided yet. I _______ go fishing with my friends.

Two weeks ago, I bought a bicycle. If you live in town, it is often faster than a car and you           worry about parking.