Question

( )3． The twins＿＿＿＿＿＿in Dalian last year． They＿＿＿＿＿＿here now．A． are; were B were;

( )6. Icleaned my classroom ___________.
A with three hours B three hours ago
C in three hours D three hours before
( ) 7. I came _______ my house two days ago .
A
back on B back to
C to back D
back
( ) 10. The koala sleeps _______，but gets up _________.
A during the day; at the evening B at day ;during night
C in the day ;during the evening D
during the day ; at nigh
答案和解析

Answer 1

3.were；are twins双胞胎谓语用复数.“去年他们在大连，现在在这”，所以第一个过去时，第二个现在时.
6.B . 三个小时前我打扫了教室。时间段+ago=before+时间段. in+时间段表示“在多长时间内,在多长时间以后”
7.B.came back to sp 回到某地
10.D.考拉在白天睡觉，在一天的时间里，用during
在晚上，at night/ in the evening

Answer 2

3.B.were;are(过去时跟现在)
6.B 我三个小时前打扫了课室。with&in 前面通常会有spend，spend (time) with sth./in doing sth.
before 一般用完成时 have done sth.
7.B.come back 我两天前回到家。came back 后接名词需加介词 to
10.D 固定搭配 during the day;in the evening ;at night