—What did your parents think about your decision?
—They always let me do ______ I think I should.
| A．when | B．that | C．how | D．What |
. Customers’ demands plus his personal interest ______ the idea of his new design.
| A．carried out | B．pointed out | C．made up | D．filled up |
Tim’s brown hair, dark glasses and the manner of walking alarmed the guards. That’s why he ______ closely.
| A．has watched | B．was watched | C．had watched | D．was watching |
Mo Yan’s Nobel Prize is likely to make the world go ______ about Chinese literature.
| A．nervous | B．serious | C．formal | D．wild |
The product in this shop is less expensive, but there is no ______ of quality.
| A．guarantee | B．symbol | C．matter | D．need |
Americans fill up their cars with gas ______ petrol.
| A．without | B．instead of | C． except | D．next to |