Determination is a kind of basic quality and is it takes to do jobs well.
| A．what | B．that | C．which | D．why |
The numbers that researchers get from the experiments can be _______, just like number puzzles.
| A．disappointing | B．inspiring | C．worrying | D．confusing |
_______ the house is empty, memories flood my mind of a time when it was filled with life.
| A．Since | B．Unless | C．As if | D．Even though |
By the time a child is five, he _______ hundreds of hours of television.
| A．will watch | B．will have watched | C．had watched | D．is watching |
There is nothing wrong with using a credit card for purchases. It’s more _______ than carrying loads of cash.
| A．convenient | B．valuable | C．sensitive | D．innocent |
If not _______, you’re allowed to return everything within 10 days for a full refund and no further duties.
| A．to satisfy | B．being satisfied | C．satisfied | D．satisfying |