—Why was Professor Zhang unhappy recently?—Because the theory he insisted on _________ wrong.
Without facts,we can’t form a correct opinion,for we need to have actual knowledge____ our thinking.
With a good ______ of both Chinese and English,she had an advantage over the other interviewees.
He stayed up too late every night,______ to catch up with his classmates.
Exercise is _______ as any other to lose unwanted weight.
______known to us,_______ increasing number of students are buried in their studies.