write the verbs in the correct tensen
1/ If he (study) harder, he could pass an exam
->
2/ She would be late if she (not hurry)
->
3/ What (you do) if you got fat?
->
4/ He (come) if you waited
->
5/ If you (ring) the bell, the waiter would come
->
6/ If it (not, rain) a lot, the  rice crop wouldn't grow
->
Giúp Mik vs ạ 

Biết khối lượng mol của hợp chất là 142g/mol. Biết thành phần % theo khối lượng của các nguyên tố là 32,39% Na, 22,54%S , 45,07%O . Lập CTHH của hợp chất? Phân loại,gọi tên? (Na=23,S=32,O=16)
Giúp mik vs ạ

                                        CONNECTIVES
1) ...... he always did well on his English tests, his parents were's surised that he got an B level.
a. When         b. Since        c. Because of       d. Although
2) You should keep The Milk in the refrigerator..........it doesn't go bad.
a. since          b. so that      c. Because           d. after 
3) you should say goodbye to your brother........you leave for Europe
a. Despite       b. After          c. since                d. Because