15, B – died (years ago -> quá khứ đơn)
16, B – hasn’t corresponded (since -> hiện tại hoàn thành)
17, C – who (thay thế cho người)
18, B – is polluted (bị động)
19, B – speaking (suggest + Ving: gợi ý làm gì)
20, C – which (thay thế cho 1 địa danh)
21, B – Although
22, A – isn’t it?
23, A – Although
24, D – goes
25, C – That’s a good idea (Đó là 1 ý kiến hay đó)
26, B – It’s very nice ò you to say so.
27, A – How far is it from here to Lang Biang mountain?
28, B – look after (chăm sóc)
29, B – thanks! I had it done this morning.
30, B – excitedly
I
1, D – erased
2,
3, C – autumn
4, B – whose
5, C – causes
II
6, D – effectively
7, C – would buy
8, A – may
9, C – predicted
10, D – look after
11, B – taking
12, A – turn off
13, D – because
14, B – However
15, C – although
16, A – who
17, B – which
18, D – was doing
19, A – haven’t met
20, B – should use
21, D – was nominated
22, C - starting
