问题
选择题
He seemed as if he ___ his homework when his mother came in.
A．did
B．is to be doing
C．were doing
D．be doing
答案
答案：C
这是以as if引导的条件状语从句,一般要用虚拟语气.这是与现在事实相反.所以选C
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He seemed as if he ___ his homework when his mother came in.
A．did
B．is to be doing
C．were doing
D．be doing
答案：C
这是以as if引导的条件状语从句,一般要用虚拟语气.这是与现在事实相反.所以选C
以下提洪若干个病例，每个案例下设若干道考题。请根据答案所提供的信息，在每一道考题下面的A、B、C、D、E五个备选答案中选择一个最佳答案。
| 患者女性52岁，拟一次性拔除口内多个残冠残根，注射局麻药后患者出现全身麻木、心悸、胸闷，表情肌及全身抽搐，随即出现脉细而弱、血压下降、神志模糊。 |
上述症状可诊断为
A．医源性感染
B．癔病
C．肾上腺素反应
D．局麻药物中毒
E．晕厥