If you are in a warmer place and can get your skin _____ to the sun for 20 minutes per day, you will need less vitamin D.A. exposing B. being exposedC. been exposed D. exposed
Considering the coming of the entrance exam,some schools have abandoned the ______of doing morning exercises.
The teacher told the monitor to ______ all the students' names who were absent from class.
John may phone tonight,I don't want to go out ______ he phones.
He is always helping people without expecting anything ______.
I will mark ______ everything you say.It is helpful to the English learners.