In our class there are 60 students, ________ a quarter wear glasses.
With a lot of difficult problems ____, the manager felt worried all the time.
As we all know, it was _____ that resulted in the terrible car accident.
In order not to be disturbed ,I spent three days ________ in my study.
With online course Crazy English has over 20 million students all over China __________ the class through the Internet .
He sat back on the chair, took a book and began to read, ___.