6. A. difficulty to pass
$\rightarrow$ have no difficulty $\rightarrow$ không có khó khăn
7. B. after finding
$\rightarrow$ After + V-ing + O + S + V2 / V-ed + O.
8. D. have been learning
$\rightarrow$ S + has / have + been + V-ing + for + period of time (khoảng thời gian)
9. A. keep pace with you
$\rightarrow$ keep pace with you $\rightarrow$ theo kịp với bạn
10. C. doing
$\rightarrow$ Sau keep on + V-ing
11. B. to visit
$\rightarrow$ Encouraged + S + to + V_inf $\rightarrow$ Khuyến khích ai đó làm gì
12. D. shouting
$\rightarrow$ Thì HTTD - DHNB: Shhh!
13. C. to going
$\rightarrow$ Looking forward + to + V-ing $\rightarrow$ Mong được làm gì đó
$\text{Cho mình ctlhn nha!}$
$\text{Chúc Bạn Học Tốt!❤}$
$\text{#Hoidap247}$