【单选题】【消耗次数：1】
I dont have to introduce the boy to you ___-you know him.
①
since
②
until
③
unless
④
but
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相关题目
【单选题】
16.I dont have to introduce the boy to you ___-you know him.
①
since
②
until
③
unless
④
but
【单选题】
A: Do you know that Tony quarreled with his brother? B: I dont know,[填空].
①
nor dont I care
②
nor do I care
③
I dont care neither
④
I dont care also
【单选题】
It is no good ___________ to know what you dont know.
①
pretend
②
to pretend
③
pretending
④
pretends
【单选题】
Since you have already come, you _____ stay here for a couple of days.
①
might well
②
might as well
③
might have to
④
might
【单选题】
A: Richard, class begins at 9, and you are late. B: I know, but I missed my bus, Im sorry. B: [填空]. You have to be here on time.
①
Thats no excuse
②
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③
You neednt be
④
No problem
【单选题】
You can not see the doctor ____ you have made an appointment with him.?
①
except ?
②
even ?
③
unless ?
④
however?
【单选题】
I know the man by ____ but I have never spoken to him.
①
chance
②
heart
③
sight
④
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【单选题】
If you have never planted anything, you won’t be able
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①
grow
②
to grow
③
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④
to be growing
【单选题】
If you have never planted anything, you won’t be able to know the pleasure of watching the thing you have planted _____.
①
grow
②
to grow
③
growing
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随机题目
【单选题】
（）是由于接受不良教育的原因造成的问题行为，如撒谎、说脏话、偷窃、不遵守规则、攻击性行为等。
①
心理发育障碍性问题行为
②
发育过程中的问题行为
③
品德性问题行为
④
心理性问题行为
【单选题】
（）指当被强化人出现他人所期待的操作性行为后，如果立即得到他需要的强化物，则被强化人再次发生同样操作的可能性和次数会增加。
①
强化法
②
正强化
③
负强化
④
移情法