In the following you will find sentences, part of which are `"bold"`. Compare the bold part of each sentences with the expressions (a) ,(b) and (c) given below.Choose the expression which is an improvement upon the bold part. If none of the three expression improves the sentences, then your answer is (d).
They `"are waiting"` for her since morning.

Options

A. have been waiting
B. were waiting
C. wait
D. no improvement

Answer

A