Lời giải:
Đáp án: A
Giải thích: a big traffic jam là số ít => dùng tobe “is”
Dịch: Tắc đường lớn trên đường vào trung tâm thành phố.
It's a good thing you lent me the money or i would have had to go to the bank.
=> If _________________________.
Rewrite the following sentences using question words + to -infinitives.
The rules didn't specify who I should speak to in case of an emergency.