He made another wonderful discovery, ______ of great importance to science.
| A．which I think is | B．which I think it is |
| C．which I think | D．I think which is |
—The screen of your phone is big.
—I like big screens．I _______ type fast on it.
| A．must | B．should |
| C．can | D．might |
—The game last night was so good.
—Yeah! Our school team won _______ two points!
| A．by | B．at |
| C．in | D．to |
Growing evidence shows _______ exercising won’t protect us if we sit too much.
| A．when | B．what |
| C．that | D．whether |
Don’t be afraid of failure．It is just _______ stepping stone to greatness.
| A．other | B．another |
| C．every | D．each |
The Twins Days Festival, _______ began in 1975, is the largest annual gathering of twins.
| A．that | B．which | C．who | D．when |