#19 Dan_________Tv when his parents arrived.
A)Had watchedB)Has watchedC)were watchingD)was watching#25 In the Middle Ages, surrounding a castle with a ditch filled with water proved___a successful tecnique_____its security.A) having been/of ensuringB)to be/for ensuringC)have been/to ensureD) being/ to be ensured#26 Don't phine Assel from 5 to 6, she_____an English class.A) hasB)will be havingC)was havingD)will have#28 There are___waiting for you.A)runner-upsB)runners-upsC)runners-upD)runner-up#29 They've____lunch. They____it at 12 o'clockA)Had/haveB)Have/hadC)had/havingD)had/had