YDS MODALS / TEST 3 23. Soru

Bu Testin Birincisi Sertavul

100 %

23.

- Using the latest and most expensive
technology, including nuclear batteries,
space scientists ....... to the furthest
reaches of our solar system now.

were probing

may have probed

used to probe

are able to probe

must have probed

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50