You can complain, but I doubt _____ it’ll make any difference.
. Please let me know how ________ you can be ready.
. You and I could hardly understand what he said, ________ ?
. ________ the case is settled out of court, it can often take years before it comes to trial.
. Put on your rain()coat ________ it rains.
.________ gas leaks and similar accidents should occur, some responsible persons should regularly inspect all the laboratories.