As nobody here knows what is wrong with the machine, we must send for an engineer to _________ the problem.
26. With age, the mineral content of human bones decreases, ______ them more fragile.
25. Let’s go a little faster, _________we’ll never get there on time.
24. ––How long have you been here? ––Only about five minutes. Henry and Simon ______ here with me.
23. ––Was ______ problem solved? ––We were trying to think of ______ way out, but it was difficult to find one.
22. Take the spare batteries with you_________you need them.