—Are you going to the concert next week?—I’d like to, but I ______ an exam then.
Americans eat____ vegetables per person today as they did in 1990.
The World Wide Web is sometimes jokingly called the World Wide Wait because it ________ be very slow.
, I lost heart in English learning, but my teacher often said to me, “Keep on studying hard , and you’ll succeed .”
First impressions are the most lasting. After all, you never get _______ second chance to make_______ first impression.
---_____that he picked up his uncle at the airport?