Question

あーんと

文章の意味は分かるのですが答えがわかりません。
答えと何故そうなるのか解説をお願いしますm(_ _)m

Patricia took her car to a repair shop because the engine Was making strange
noises。 She read some magazines inside the shop while her car (           0

1 was checking                     2 wasbeing checked

8′ had been checked                 人44 would be checking

英検