单选题 We have to ______ the task on time.

单选题 To make sure the plan ______ our arrangements, you need to have a discussion with him.

单选题 It was cold. ______, I went swimming.

单选题 In order for our team to win, everyone has to ______.

单选题 We will also visit some museum ______ the Palace Museum.

单选题 He tried to ______ his absence with poor excuses.

单选题 We have to ______ ourselves to solve the problem because they are very busy for the moment.

单选题 The heavy rain ______ the flow of traffic yesterday.

单选题 They look so similar that it's often difficult for people to ______ between them.