___he met with the difficulty did he realize the importance of our help.
| A．Even though | B．Only before | C．Never until | D．Ever since |
Because the shop ______, all the T-shirts are sold at half price.
| A．has closed down | B．closed down |
| C．is closing down | D．had closed down |
—What do you think of John?
—He’s a good boy, but he ______ be really stubborn at times.
| A．can | B．might | C．must | D．need |
In order to support his study, his brother can’t wait ______ money.
| A．to earning | B．to earn | C．for earning | D．for earn |
It’s always difficult to live in a foreign country, ______ when you don’t speak the language.
| A．extremely | B．especially | C．basically | D．naturally |
He still remembers the place ______ we visited last year?
| A．that | B．where | C．when | D．in which |