We were busy ________ (get) things ready for the trial production when he phoned us.
getting
暂无解析
Somemoleculesarelargeenough________(see)undertheelectronicmicroscope.
Hefellasleepimmediatelylastnight;hemust________(be)verytired.
Thistest________anumberofmultiplechoicequestions.
Wewerebusy________(get)thingsreadyforthetrialproductionwhenhephonedus.
You________gonow.It’sgettinglate.
