Jack has failed twice in _____ PE test, he decided to have _____ third try

“What are you busy for”—This is a question we veryoften get _____ nowadays

Paris has some great museums ______ visitors can see fine works of impressionist painters.

_____ it was very cold, _____ my friend still went swimming in Jialing River this morning.

_____ with so much trouble,I am afraid, they will fail to complete the task on time [ ]