The little child usually felt frightened at night, so not until ___________.
| A．did he fall asleep his mother left the room |
| B．he fell asleep had his mother left the room |
| C．did he fall asleep did his mother leave the room |
| D．he fell asleep did his mother leave the room |
China held a grand parade in Beijing to mark the defeat of Japan in World War Two, ________ its military power on an unprecedented scale.
| A．displayed | B．displaying |
| C．to display | D．having displayed |
They use computers to keep the traffic _________ smoothly.
| A．being run | B．run | C．to run | D．running |
The news came as no surprise to me.I _____ for some time that the factory was going to shut down.
| A．knew | B．had known |
| C．have known | D．know |
______ Tina cares about most is whether the company provides opportunities for further education.
| A．Which | B．What | C．That | D．Why |
—These grapes look really beautiful.
—They ______！See the price，$3.99 a pound.Very expensive，aren’t they！
| A．would | B．could | C．might | D．should |