The girl was frightened at the sight of a snake and her heart was _______ fast.

There are about _______ students in their school now..

My sister met him at the Grand Theatre yesterday afternoon, so he ________ your lecture. [ ]

－Mom’sgift She _______ have chosen a better one for me－Shemust be very happy to know it

I am __________ endless examinations. —Cheer up, David. Keep on until the college entrance examination ends.