Well, we have been waiting here＿＿＿＿＿for the guest.
| A．long time | B．a long time | C．the long time | D．some long time |
______ Tina cares about most is whether the company provides opportunities for further education.
| A．Which | B．What | C．That | D．Why |
______ the sight was impressive on the top of the mountain, I made an effort to climb onto it.
| A．To know | B．Know | C．Known | D．Knowing |
We still have some other ways to solve the problem. You ______ be worried.
| A．mustn’t | B．can’t |
| C．don’t have to | D．may not |
Harry Potter has made reading popular again, ______ is why parents and teachers like the book, too.
| A．that | B．who | C．which | D．what |
Some countries have banned smoking in public places ______ public health.
| A．improve | B．to improve |
| C．improving | D．improved |