Upon ______ the office, he saw the message on his desk.
A. he arrived B. arrived at C. arriving at D. arriving
— Where’s Emma?
—I can’t say for sure where she is, but she _____ be out shopping.
A. can B. should C. must D. may
I always take an umbrella to work with me in spring, _____ it rains.
A．in case B．so that
C．until D．as if
________ is known to everyone, the moon travels around the earth once every month.
A．It B．As C．That D．What
- Have you moved into the new flat?
- Not yet, the rooms __________.
A. are being painted C. are painted
B. are painting D. are being painting
Tony ______ his homework this morning before he went to school.
A. has done B. did C. has done D. will do
