Had I known about this computer program, a huge amount of time and energy .
| A．would have been saved | B．had been saved |
| C．will be saved | D．was saved |
______ the price of gas is starting to come down, many people are choosing to take the bus or the train instead.
| A．Even though | B．Now that |
| C．In case | D．As though |
______ 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 |