He worked hard, ______ he passed the exam

she grew older she gained in confidence.[ ]

Tom received an invitationfrom Carrol but he ______

Which is the _______ way to Qingdao, by plane, bus or train?

Would you like to come to the dinner party here on Saturday ?　 —Thank youI’d love to, _____ I’ll have to finish all my homework before the weeked, otherwise, my parents won’t let me go.]