---Where is Tom?-He hasn’t come to school today. I think he be ill.A. has toB. shouldC.

问题补充：

---Where is Tom? ---He hasn’t come to school today. I think he be ill.

A. has to

B. should

C. may

D. need

答案：

A. has to

B. should

(答案→)C. may

D. need

解析：句意：汤姆在哪里？他今天没来学校。我认为他可能病了。A不得不B应该，指责任义务C可能，表猜测。D需要。根据句意，故选C