—Listen! There is a knock on the door. Who _____ it be?—It must be Jack. Just now I sent for him.
It’s difficult to _______ a conversation with someone who only says “yes” and “no”.
----- Why does Sara know so much about Angkor Wat? ----- She _________ have been there, or….
. Some of the scientists held the point ______ the book said was right.
Hello. You ________68442936. I’m sorry I’m unable to answer your call right now.
Later she wrote us a letter, expressing her thanks to us for lending her_____ hand when she was in_______ trouble. A. /, the B. a, / C. a, the d. /, /