$1.$ Though their son is allergic to animals, they decided to get a cat.
- Though + S + V, S + V (Mặc dù).
$2.$ He will stay in England for 2 months more in order that he can perfect his English.
- in order that + S + V.
$3.$ We have to go shopping today as there is nothing to eat.
- as + S + V: bởi vì.
$4.$ I will stay with my aunt and uncle when I go to Hue next week.
- when: khi.
$5.$ Mai studies hard for the exam so that she could have good marks.
- so that: vậy nên.
$6.$ We need an umbrella since it is raining heavily outside.
- since + S + V: bởi vì.
$7.$ Nick will visit some craft villages after he finishes the VN course.
- after: sau khi.
$8.$ Even though it was very cold out we decided to do for a walk in the park.
- Even though + S + V, S + V (Mặc dù).
$9.$ They went to Van Phuc village because the tourists wanted to buy some silk.
- Because + S + V (Bởi vì).
$10.$ They won't buy a new car until they save enough money.
- until: cho đến khi.