46).......she was going to visit her grandmother the following week

47).........you meet yesterday is working at Bach Mai hospital

48).........has been stolen

49)........was sick,she insisted on going to work 

50)........had he put the phone when the doorbell rang

1. Nga said that she was going to visit my grandmother the following weekend.

Giải thích: Áp dụng cấu trúc câu gián tiếp: Sp + said/asked + Lr + S + V (lùi thì ở câu trực tiếp) + C 

2. The doctor whom you met yesterday, is working at Bach Mai hospital.

Gt: Xem lại mệnh đề quan hệ

3. The picture has been stolen.

Gt: Cấu trúc câu bị động

S(O) + tobe + V_pII + C

4. Although Mary was sick, she insisted on going to work.

Gt: Xem lại cấu trúc câu với từ In spite of/Despite với Although:

In spite of/Despite + N, ...

Although + Clause, ...

5. Scarcely had he put phone down when the doorbell range.

Cấu trúc scarcely:

Scarcely + had + S + V_pII/V-ed + when + S + V_pI/Ved.

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