Tom is very happy in China during this period because his Chinese ________ every day.
A．has improvedB．is improving
C．improvedD．is improved
B
考查動詞時態(tài)。句意：在中國的這段日子Tom很高興，因為他的漢語水平天天在提高。用現(xiàn)在進行時表示現(xiàn)階段正在進行的動作。
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