Put the verbs in brackets into the correct from.where... Roger ... (to go)?-He ... (to go) to the exhibition.2)What ... you ... (to drink)?-I ... (to drink) apple juice.3)Who ... (to ride) a bike over there?-My neighbour Mike is.4)Why ... Dolly and Cathy ... (to look) through the magazines?-Because they ... (to look) for some information for their report.5) ... it ... (to snow) outdoors?-Yes, ... .It ... (to snow) very hard and it ... (to get) colder.6)Whom ... he ... (to speak) to?-He ... (to speak) to his uncle.They ... (to discuss) what present to buy for granny.7) ... Helen ... (to go) to her office now?-No, ... .She ... (to have) a day off today.8)What ... they ... (to do)?-They ... (to repair) a motorbike.9)Where ... you ... (to hurry)?-I ... (to hurry) to the concert.My husband ... (to wait) for me near the concert hall.10)Who ... (to prepare) the performance in the assembly hall?-My classmates ... (to have) a rehearsal there now.
* 39= 7
40572 25
+ 13524= 21
175812 47
42
56
56
0
13680/30=456
120
168
150
180
180
0
62/120 + 31/120 - 1/30 = 93/120 - 4/120 = 89/120 - осталось через 3 часа. После закрытия 1-го и 2-го кранов бассейн заполнял только 3-й кран и работал слив, т.е. осталось заполнить 120/120 - 89/120 = 31/120.
1/20 - 1/30 = 1/60 (объема в час) - с такой скоростью стал заполняться бассейн, теперь найдем время, за которое он заполнился: 31/120 / 1/60 = 15,5 часов.