With a lot of difficult problems ______, the newly-elected president is having a hard time.
We have to delay the party till next week, ____we will not have something important Tod o. A.when B.whichC.atwhich D that
I don’t like such a person____often lies before your face.
.By using ear sonecan tell the direction____a sound comes.
I don’t believe the reason____he has given for not coming to the lecture.
In the forest we observed some trees____the leaves were black with disease.