If only I _________ crashed the car!
A. had
B. hadn’t
C. did
D. didn’t
查看答案
He wouldn’t have been late for the exam if he ____________ earlier.
A. leave
B. left
C. had left
D. hadn’t left
Where is John? He should ___________ home hours ago.
A. be
B. were
C. had been
D. have been
1.服务贸易的四种供应模式（ ）
A. 商业存在、跨境支付、自然人流动、境外消费
B. 商业存在、跨境支付、自然人流动、留学访学
C. 移民居住、跨境支付、自然人流动、境外消费
D. 商业存在、跨境支付、劳务输出、境外消费
2.服务贸易的四种供应模式中，占比最大是哪种
A. 跨境支付
B. 商业存在
C. 自然人流动
D. 境外消费
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