Question

I didn’t know __________________.

A．how many times he has been to his favourite place of interest

B．why did he go to France

C．What’s the matter with the Ipad bought yesterday

D．who to ask for help when in trouble

Answer 1

D

試題分析：賓語從句的結(jié)構(gòu)：主語+謂語+連接詞+從句。從句在句中作賓語。從句要用陳述句的語序。如果主句是一般現(xiàn)在時，從句根據(jù)需要選擇時態(tài)，如果主句是過去時態(tài)，從句要用相應(yīng)的過去時態(tài)。但是從句是客觀真理，一般用一般現(xiàn)在時態(tài)。該句的主句是過去時態(tài)，故排除AC，B語序不正確。故選D。