15. He ________ his doctor’s care ________ he is quite well again.
They were swimming in the river ______ suddenly the storm started.
________ a difficult situation, so you should send a message to him and give some advice to him .
It was dark______ we arrived at the little town .
—Oh, I failed again —Don’t lose heart. One more time, ________ you will succeed.
Mary does every single bit of housework ______her husband Bob just does the dishes at times.