Question

－Hello, Mary! This is John. You must know why I _________ you.
－Oh, hello, John! I've waited for this call since last month.

A．called

B．am calling

C．was calling

D．have called

Answer 1

B

考查動詞時態的用法。兩人正在電話通話，而且后面提到的電話也是這個電話，排除了其他時間的電話。所以“我給你打電話”用現在進行時。