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