Flying kites, ______ some researchers point out, can not only bring about joy to us, but also promote our physical and mental health.
| A．which | B．what | C．as | D．where |
I hadn’t seen her for 10 years, but I ______ her at once.
| A．realized | B．recognized | C．knew | D．found |
There is ______ thing as a free lunch.
| A．no such | B．not such | C．no a | D．no such a |
The old woman walks ______ dog after ______ supper every day.
| A．a; the | B．/; / | C．the; the | D．the; / |
I have got ______ of the work, because it is too ______.
| A．tired; tiring | B．tiring; tiring |
| C．tired; tired | D．tiring; tired |
During my visit to Africa, I suffered a lot ______ the heat there.
| A．of | B．in | C．over | D．from |