Other genetic similarities suggested they all ________ a single, common ancestor about 300 years ago.
A．had B．have had C．have D．had had
The managers consider it is important that everything ________ by weekend.
A．will complete B．has completed
C．be completed D．is completing
—Your sitting room looks so clean and tidy.
—Well, thanks to the babysitter. She is a real ________.
A．finding B．invention C．find D．discovery
Don't worry about my illness. What I need is ________ but a few days' rest.
A．anything B．everything C．something D．nothing
You surprise me! You ________ fall asleep in such an important meeting.
A．must B．may C．can D．should
There were no other houses beyond her garden, ________ made it seem like her house lay at the end of the world.
A．which B．that C．where D．what
