—You may find the key to the math problem on page 107．—Ah, it's so simple. I wonder why I _____ of that．
#100893
A
hadn’t thought
B
haven't thought
C
didn't think
D
wasn't thinking
推荐题目
---Don't put the waste on the ground. ---Oh, I'm very sorry. I ________ the dustbin（垃圾箱） there.
#101450
A
don't see
B
isn't seeing
C
didn't see
D
haven't seen
Jiangsu Province ____ a series of activities to protect water resources over the past few months. Early this year, several cities ___ citizens to use new types of toilet equipment.
#103508
A
organised; called for
B
has organised; called for
C
organised; has called for
D
has organised; has called for
—Where is Mr Smith?—He in prison for more than two months.
#102721
A
has been
B
has been sent
C
has been thrown
D
has been put
When I got on the bus，I_____I had left my wallet at home．
#102064
A
was realizing
B
realized
C
have realized
D
would realize
—Why didn’t you answer the phone when I called you last night?—Sorry, I __________ a bath upstairs.
#99820
A
am having
B
have
C
was having
D
had