单选题 The scientist conducted ______ to test the theory.

单选题 He drank ______ before the race.

单选题 We need ______ to finish the project.

单选题 There are ______ on the shelf.

单选题 The teacher gave us ______ on how to improve our writing.

单选题 She has ______ in her bag—maybe a pen or a pencil.

单选题 Could you pass me ______? I need to cut this paper.

单选题 She bought ______ for the party.

单选题 There is ______ on the floor. Pick it up!