Every device ______in the plane must be designed and made with great care so as to make sure that nothing goes wrong in operation.
Tom doesn’t want to take part in any school activities,________.
—Will he be back by ten tonight? —No, _____.
—Tom, would you like to come to our dinner party? — _____.
I don’t doubt ________ the plan will be well-conceived.
—Shall I begin the lecture? —I’m afraid we have to wait for a while. John is coming with a microphone. — ______. I can do without the microphone.