though they are not doubtful at all _______ John will pass the exam, I still wonder ______ he is fully prepared.

－Why does the river smell terrible?－Because large quantities of water______

Tomalways prefers _________on foot rather than _______ a bike.

n’t have the horse ________ all the way. It’s too hot.– Sorry, it ________ my fault. I will stop it right now.

When I left the island last night，_______ word came that _______strong wind would hit it soon