37. My father was reading newspaper at 8 o'clock last night.

-> at 8'o clock last night -> thời gian cụ thể

-> QKTD -> S + were/was + V-ing 

38. I will call you as soon as I arrive at the station.

-> As soon as + HTD, TLD 

39. There are thirty - four national parks in VietNam now.

-> There are/is + N

40. The train leaves at 4 : 30, so we still have a lot of time. 

-> HTD -> S + Vo (s/es)

-> a lot of + N (số nhiều đếm được/không đếm được)

37. My father was reading newspaper at 8 o'clock last night.

at + giờ 

DHNB: at 8 o'clock last night (QKTD)

S + was/were + Ving

38. I will call you as soon as I arrive at the station.

TLĐ + as soon as + HTĐ: ngay khi 

39. There are thirty-four national parks in Viet Nam now.

There are + số lượng + N số nhiều 

in + nước 

40. The train leaves at 4:30, so we still have a lot of time. 

S số ít+ Vs/es: thì HTĐ

at + giờ 

Clause + so + clause: vì vậy 

S số nhiều, I, we, they, you + have + N 

a lot of + N số nhiều / N không đếm được 

`color{orange}{~MiaMB~}`