It takes a long time to prepare the dish but it is so delicious that it's worth the __________.
I hadn’t expected Robert _____,but I had hoped____.
Her son promised _____in the bedroom until the baby stopped_______.
In the past , people used _____that the moon was too far away ________.But now it is possible for man ____there by spaceship.
The Olympic Games, _______in 776 B.C ,did not include women players until 1912. A. first played B. to be first played C. first playing D. to be first playing
I can hardly imagine Peter ______across the Atlantic Ocean in five days.