B.Grammar and Lexicology

I.Choose the best answer

1.A:''Was Paul at the party when you arrived?'' B:''No,he..........''

A.went B.had gone C.has gone D.goes

2.Having overcome a lot of difficultly ,he............. to find a good job

A.managed B.succeeded C.obtained D.realized

3.Laura wonders why .................. tell a secret to him

A.she would rather B.she would prefer C.she would like D.would she like

4.However ................... she couldn't find a good job.

A.hard she tried B.hard did she try C.hardly she tried D.hardly did she try

5...............that she got fainted

A.So exhausted she was B.She was so exhauting C.So exhausting was she D.So exhausted was she

6.Your brother was ................. driver!

A.how careful a B.so a careful C.so careful a D.what a careful

Giờ thứ ba ô tô đi được quãng đường là :

(40 + 45) : 2 = 42,5 (km)

Trung bình mỗi giờ ô tô đi được quãng đường là :

(40 + 45 + 42,5) : 3 = 42,5 (km)

Đáp số : 42,5 km

cho mình cách tính bài này Vũ Huyền nhé 

bn TRẦN VIỆT DŨNG giúp mik vs, mik lại cần rồi ^_^