She had to hand in her notice ___ advance when she decided to leave the job.
Đáp án C: in advance: trước
______ his brother, Mike is active and friendly.
The pool should not be made so deep______small children can be safe there.
He_______________us but he was short of money at the time.
The Lake District,____________________ was made a national park in 1951, attracts a large number of tourists every year.
The word "allocated" in the passage mostly means "______".
Only one of our gifted students______to participate in the final competition.
_______ has been a topic of continual geological research.
She asked me______I was looking at.
______ one of the most beautiful forms of performance art, ballet is a combination of dance and mime performed to music.
There has been a great increase in retail sales,_____________________ ?