IF IT _______ TOMORROW, WE MAY POSTPONE GOING ON A PICNIC.A. RAINS...

21. - BAI TAP TRAC NGHIEM CAU DIEU KIEN
BAI TAP TRAC NGHIEM CAU DIEU KIEN
21. If it _______ tomorrow, we may postpone going on a picnic.a. rains b. will rain c. shall rain d. raining