1. If she ___ about his problems, she would have helped him out. my answer : B a) knew b) had known c) has known d) had been knowing 2. I will ____ her kids when she is away on a business tour. my answer : C a) be looking at b) be looking after c) be looking for d) be looking into 3. Terriers___ good hunting dogs. my answer : A a) make b) are making c) will be making d) all of these could be used here 4. The assignment was ____difficult that I couldn't finish it on time. my answer : A a) so b) such c) very d) too 5. By the time her husband returns from work, she ____ dinner. my answer : A a) will cook b) will have cooked c) would cook d) will be cooking