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If he ________harder , he will catch up with us soon .

A.  study     B. studies    C. will study    D. studied

If he _______ harder, he will catch up with us soon.         

A. study                      B. studies                    C. will study         D. studied

If he ________ harder, he will catch up with us soon.

A. study

B. studies

C. will study

D. studied

If he ______ harder, he will catch up with us soon.

A. study

B. studies

C. will study

D. studied

If he ________ harder, he will catch up with us soon.

A. study

B. studies

C. will study

D. studied

If he ________ harder, he will catch up with us soon.

A. study

B. studies

C. will study

D. studied

A. study　　　　　　    B. studies

C. will study　　　　  D. studied