Was it not until you began to work ___ how much time you had wasted?
| A．did you realize | B．that you realized | C．did you not realize | D．that you didn’t realize |
People often have this belief _______economic development is bad for the environment, but this does not have to be true.
| A．what | B．which | C．that | D．when |
I don’t think Susan will be sad but I’ll go and comfort her ______ she is.
| A．in case | B．even though | C．as if | D．unless |
China Business Daily reported the 60% discounts on some Beijing-shanghai flights have now slipped back to 20% _______ one day in advance.
| A．when books | B．when to book | C．when booking | D．when booked |
With so many people ______ around her, the girl felt very nervous and grasped her mother’s hand tightly.
| A．standing | B．having stood | C．stood | D．stand |
It’s reported that Nest Chat allowsusers to block others when they want to avoid _______.
| A．to be disturbed | B．to disturb | C．being disturbed | D．disturbing |