Nhưng mà lại sai đề cơ

C

Bạn lại chép mạng r

Thân cao trội hoàn toàn so với thân thấp

Quy ước gen: A thân cao.                  a thân thấp

=> F1 thu dc 100% thân cao

=> F1 nhân hai giao tử: A và a=> kiểu gen P: AAxaa

sơ đồ lai

P.     AA( thân cao). x.  aa( thân thấp)

Gp.   A.            a

F1.   Aa(100% thân cao)

1.It’s a pity I don’t know where he is.

->I wish_I knew where he was

2. We can’t go out because of heavy rain.

->We wish_we could ho out 

3.Why don’t we go away more often?

->I wish_we go away more often

4. John smoked a lot a year ago, but now he doesn’t smoke any more.

->John used_to smoke a lot a year ago

5.The last time she went out with him was 9 months ago.

->It is_the first time she has gone out with him

1.    Our teacher, Mrs Jones, …has never been…. (never/be) late for lessons.

2.    I  often clean ……. (often/clean) my bedroom at the weekend.

3.    My brother …has hardly ever holp …. (hardly ever/help) me with my homework.

4.    I ……sometimes am……. (sometimes/be) bored in the maths lessons.

5.    We …rarely watch………. (rarely/watch) football on TV