During the reconstruction of the city, many modern tall buildings went up ______ old shabby houses were torn down.
| A．where | B．in what | C．in which | D．which |
They also agree that it is the burning of more and more fossil fuels that has resulted ____ this increase in carbon dioxide.
| A．from | B．of | C．in | D．to |
____ late in the morning, Bob turned off the alarm.
| A．To sleep | B．Sleeping | C．Sleep | D．Having slept |
It is only when the disease has progressed to the AIDS ____ a person begins to look sick.
| A．which | B．what | C．who | D．that |
The warmth of ____sweater will of course be determined by the sort of ____wool used.
| A．the, the | B．the, / | C．/, the | D．/,/ |
— Can you keep an eye on my bag, Tom? I just want to use the bathroom.
—____. It will be safe with me.
| A．Go ahead | B．I think so | C．Not at all | D．You’re welcome |