Hardly had he finished his speech ________ the audience started cheering.
A、andB
暂无解析
Wewerebusy________(get)thingsreadyforthetrialproductionwhenhephonedus.
Ifound________toanswerallthequestionswithinthetimegiven.
Somemoleculesarelargeenough________(see)undertheelectronicmicroscope.
Ipreferthisdiagram________thatone.
Tosucceedinascientificresearchproject________.
