e the students understand the problemthe teacher tried to explain it, but the explanation just did not _________tothe class．

tch was very good, and he 20percent down for it.

It is ___ __ that Armstrong sent a message _ _____ that UFO appeared when Apollo 11 landed on the moon.

We are too busy to take _______holiday at present.— But I think we’ll be able to take_______ two weeks away.

Some leaves from the tea plant fell into the water and ____________ /ri’meind/there for some time.