He is tired, _________ he has to stay up late.
a. therefore
b. so
c. and
d. but
Đáp án: d
Add question tags to the following statements.
You live near here, ___________________?
Choose a, b, c or d to complete these sentences.
They _________ Da Lat last summer.
Your central heating doesn’t work very well, ___________________?
You haven’t heard a forecast for the weekend, ___________________?
Choose the word which contains the vowel sound pronounced differently from that of the others.