“On no account _____ to feed the animals,” the warning can be seen on the signboard on front of every cage (笼子).
| A．allow visitors | B．are visitors allowed |
| C．visitors are allowed | D．are allowed visitors |
Nowhere else in the world, in my opinion, _______ more attractive scenery than in Mount Huangshan.
| A．you can enjoy | B．enjoy you | C．you enjoy | D．can you enjoy |
The country's railway system has launched online ticket-booking and a real-name ticket purchasing system, and _______ requires passengers to provide their ID numbers when buying tickets.
| A．which | B．that | C．what | D．this |
—Have you been working in N0.5 Middle School since you graduated from college?
~No, I _______ in the countryside for 3 years.
| A．have taught | B．had taught |
| C．have been teaching | D．taught |
What some Chinese parents understand is that nothing is fun _______ their children are fond of it.
| A．after | B．when | C．if | D．unless |
The owner of the jewelry store says a(n) _______ of $ 1,000 will be offered to anyone who can find the lost jewels.
| A．income | B．reward | C．bonus | D．fee |