He came back late, _____ which time all the guesses had already left

We want to encourage the students ________ theteaching.

computers areconvenient to us in daily life, it may also cause other problems

Please speak to those children with hearing problems so that they can read your mouth more easily and understand better.

6The American journalist as well as several other foreigners ______ with the August Medal for helping the Chinese people ______independence from the Japanese